Loose-leaf binder.



J. G. DAWSON. LOOSE LEAP BINDER.

APPLICATION FILED MAR.16, 1906.

934,430, Patentedfiept. 21, 1909.

UNITED PATENT ()FFICE.

JAlVlES C. DAWSON, OF EVEBSTEB GROVES, IVIISSOUBI. ASSIGNOR TO SIEBER &TRUSSELL EIANUFACTURING COIVKPANY. A CGEPORATION OF MISSOURI.

LOOSE-LEAF BINDER.

Specification of Letters Patent.

Patented Sent. 21, 190%).

Application filed March 16, 1908. Serial No. 308,323.

T 0 all whom it may concern:

Be it known that 1, JAMES C. Dawson, a citizen of the United States, andresident of Webster Groves, county of St. Louis, and

, State of Missouri, have invented certain new and useful Improvementsin Loose-Leaf Binders, of which the following is a specification, andwhich are illustrated in the accompanying drawings, forming a partthereof.

The invention relates to that type of loose leaf binders in which thereis used rocking hooks or arches for engaging the leaves to be bound, theinvention being peculiarly well adapted for use in connection withcheckbooks, price-books, catalogues, etc.

The object of the invention is to simplify the construction and actionof devices of this kind; and it consists in the mechanism hereinafterdescribed and which is illustrated in the accompanying drawings, inwhich- Figures 1 and 2 are detail plan views of the binder open, showingtwo forms in which the invention may be embodied; Figs. 3, 4-, 5 and 6are details of the device showing the construction and operation of theparts.

The binder is preferably provided with the stiff side-boards l0 and 11,united by a limp back 12, to the inner face of which there is secured ametal plate 13, which has its side edges overturned to pivotally securethe pivoted member of the arches and to serve as the lock for securingthem in their closed position.

The arches 1st, 15, are united by means of an integral pivot member 16,adapted to be housed within one overturned edge 17 of the plate 13. Thisoverturned edge or roll is cut away, as shown at 18, 19, to accommodatethe arches 14, 15, the recesses thus formed being spaced apart a lessdistance than the length of the pivot portion 16 of the arches, therebypermitting the latter some longitudinal movement. Each of the archeslet, 15, is notched adjacent its free end, as shown at 20, for engagingthe opposite overturned edge 21 of the plate 13, and this portion of theplate is recessed, as shown at 22, 23, to permit the ends of the archesto enter it, the arches being locked by sliding them alonglongitudinally of the plate 13 to bring their notches into engagementwith the edge of the portion 21 of the plate, as shown in Fig. 3.

A single pair of arches 14:, 15, may be employed, as shown in Fig. 1, ortwo pairs may be used, as shown in Fig. 2. In the latter form ofconstruction one member only of each pair of arches, as 2% and 25, beingthe arehest nearest the end of the plate 13, are provided with lookingnotches. As shown in Fig. (5 preferably the pivot portion 26 of suchpair of arches is indented or recessed intermediate of its ends, asshown at 27, so as to be engaged by the inner arch of the opposite pair,thereby interlocking the two pairs of arches so that they will movelongitudinally of the plate 13 in unison. This modification is notclaimed herein but is made the subject of a divisional application.Apertured sheets are applied to the arches of such devices by firstturning the latter back upon their pivots. The two pairs of arches, asrepresented in Fig. 2, have this advantage over the single pair in thatall of the sheets, except the one to be removed or inserted, may remainupon the arches while they are open.

I claim as my invention 1, In a loose leaf binder, in combination, apair of arches rigidly united by a common pivot member, one of saidarches having a head; a bearing for the pivot member within which it islongitudinally movable; and a detent into which the arch head is broughtinto engagement by the longitudinal movement of the pivot.

In a loose leaf binder, in combination, a back plate having its sideedges turned inwardly; a pair of arches; a pivot member uniting thearches and having a rotative and sliding bearing within one of theinturned edges of the back; such arches having notches at their freeends for engaging the opposite side of the back plate. 7

3. In a loose leaf binder, in combination, a back plate having its sideedges turned inwardly, a sheet-receiving arch, a pivot member transverseto the plane of the arch and to which the arch is secured one of itsends, such pivot member having a rotating and sliding bearing within oneof the inturned edges of the back plate, the other inturned edge of theback plate being notched and the free end of the arch being notched toengage the last-named inturned edge of the back plate and being movableinto and out of register with the notch thereof by the sliding of thepivot member.

at. In a loose leaf binder, in combination, a

5. Ina loose leaf binder, in combination, an arch, a pivot membertransverse to the plane of the arch and to Which the arch is rigidlysecured atone end of its span, a bearing for the pivot Within which itis longitudinally movable, and a detent into which the free end of thearch is brought into engagement by the longitudinal movement of thepivot.

JAMES C. DAWVSON. Vitnesses EDWIN W. MILLS, CLYDE J. BRYANT.

